Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 100% schema coverage the baseline is 3, and the schema already documents url, count, start, and account_id. The description adds real meaning beyond the schema by clarifying the count behavior for standard LinkedIn (fixed ~10/page) and framing start+count as a pagination pair, which the per-parameter schema text does not convey as a workflow.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.